join vs inner join
-- Rows with ID existing in both a and b
-- JOIN is equivalent to INNER JOIN
SELECT a.ID, a.NAME, b.VALUE1 FROM table1 a
JOIN table2 b ON a.ID = b.ID
WHERE a.ID >= 1000;
-- ⇓ Test it ⇓ (Fiddle source link)join vs inner join
-- Rows with ID existing in both a and b
-- JOIN is equivalent to INNER JOIN
SELECT a.ID, a.NAME, b.VALUE1 FROM table1 a
JOIN table2 b ON a.ID = b.ID
WHERE a.ID >= 1000;
-- ⇓ Test it ⇓ (Fiddle source link)merge clause with inner join
MERGE table1
USING (SELECT table3.keycolumn,
table2.DataColumn1,
table2.DataColumn2
FROM table2
INNER JOIN table3
ON table2.anotherKey = table3.anotherKey
WHERE table2.anotherKey = 'A1') tmpTable
ON
table1.keyColumn = tmpTable.keyColumn
WHEN MATCHED THEN
UPDATE
SET table1.DataColumn1 = tmpTable.DataColumn1
,table1.DataColumn2 = tmpTable.DataColumn2;Copyright © 2021 Codeinu
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